Heteroleptic pyridyl-carbene iron complexes with tuneable electronic properties

Thibaut Duchanois, Thibaud Etienne, Marc Beley, Xavier Assfeld, Eric A. Perpète, Antonio Monari, Philippe C. Gros

Research output: Contribution to journalArticlepeer-review


New heteroleptic iron complexes mixing a terpyridine bearing a protonable pyridyl substituent (pytpy) and a pyridyl carbene ligand (carb) have been prepared and characterised by UV/Vis spectroscopy, cyclic voltammetry and TD-DFT computations. The absorption spectrum of [Fe(carb)(pytpy)]2+ showed a notable redshift compared with the homoleptic [Fe(carb)2] 2+ complex. The MLCT transition occurred at even lower energy when the pendant pyridine was protonated, leading to a wide absorption domain in the 450-650 nm range. Calculations revealed the strong propensity of excited electrons to move from the metal to the pytpy ligand in the complex. This new family of complexes is a promising addition to the arsenal of iron-based chromophores with tuneable electronic properties.

Original languageEnglish
Pages (from-to)3747-3753
Number of pages7
JournalEuropean Journal of Inorganic Chemistry
Issue number23
Publication statusPublished - 2014


  • Carbenes
  • Chromophores
  • Iron
  • N ligands
  • Photophysics
  • Tridentate ligands

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